Shuttle mechanism for weaving machines



1932- P. R. WATSON ET AL 1,840,758

SHUTTLE MECHANISM FOR WEAVING MACHINES Filed July 25, 1950 (sf IHIII/IIIIIIII/l/IIIIIIUU1 .[rrusnturs Pierce Rwatamn Annie: G.Phlll|:sun

Patented Jan. 12, 1932 131E303anrlvranwarson-annenmn ewnnnonxn rHILIPsoN, or srcarrrntamiss;

ONTARIO, CANADA; SAID E'HILIPSON ASSIG'NOR TO SAID WATSON fsiiu'rrtn 'M onAnIsrr FOR wnavme MACHINES 15 foregoing nature constructed and arranged all as hereinafter more particularly described and illustrated in the accompanying drawings in which, v

Fig. 1 is a perspectiv'e view of'a standard 20 shuttle as is used in weaving looms.

Fig.2 is a front elevational view of a fragmentary portion of the discharge end of a loom shuttle race, and

Fig. 3 is an end elevational view of the 25 portion illustrated in Fig. 2.

7 Like characters of reference indicate corresponding parts in the different views. 7

It will be understood by those conversant with the art of weaving that in automatic looms or any weft replenishing looms that the quill or bobbin upon which the weft thread iswound iswhen exhausted expelled from the shuttle and replaced by a new quill or bobbin whilst the loom is in continuous operation. Heretofore many thousands of dollars worth of lengths of material have been spoiled or reduced from first grade to second grade material through the remnant thread upon the exhausted and expelled bob- 40 bin remaining in the shuttle after the bobbin or quill has been expelled and the new bobbin or quill inserted, thus causing a double thread to be woven into the fabric during the following travel of the shuttle.

The standard quills or bobbins trated in the-drawings consist of a thread receiving shank 1 formed at one end with a head 2 by means of which the quill or bobbin is spring held in the shuttle 3.

The head of the quill or bobbin is necessarily at the opposite the discharge end of 193 Serial 1%; 4'?O,712. V

end of the shuttle to the shuttle eye l as the head is gripped in the shuttle and the thread carried from the shank through the shuttle eye. hen an exhausted L V, quill or bobbin in the "shuttle is being ref placed, a replacement quill or bobbin is auto matically positioned over the shuttle race at its stroke and when the shuttle pauses underneath the replacement quill, such replacementquill is forced down-' wardly by a plung'er'member 5 and enters the shuttle expelling the exhausted quill or bob bin which falls downwardly through a chute 6 into any suitable receptacle underneath.

As the head of the quill or bobbin is much heavier than the opposite end, it being of much greater diameter, and also as it is usually wound with metal bands 7, it willbereadily perceived that the quill or bobbin in falling will swing so that the head 2 falls foremost. It will also be apparent that when the replacement "quill or bobbin is forced downwardly expelling the exhausted quill or bobbin that the head of the replacement-quill will strike the head of the exhausted quill, rather than the thread wound shank of the replacement quill striking the shank of-the exhausted quill, so that the head of theexhausted'quill is given this additional impetus in its downward and foremost swing.

It will be therefore apparent that when the quill or bobbin is expelled in the ordinary fashion that the heavy head portion willswing downwardly in the falling movement, thus permitting the remnant thread remain wind itself thereofl as in u on the shank to the quill or bobbin falls, thus leaving the end 8 of the threadin the eye 4 of the shuttle, so that such remnant thread remains in the shuttle and is carried across through the warpthreads by the next shuttle movement which causes a double thread tobe woven in as the thread upon the replacement bobbin isof course also woven into the fabric at as 1llusthe same time in the normalmanner. 'As the thread is wound upon the shank of the quill or bobbin with the particular object of permitting it to readily unwind thereoff in pass?- ing to the eye, it the downward movement oft-he quill or bobwill be readily apparent that bin in falling head first will readily permit the remnant thread upon the exhausted quill to remove itself therefrom and remain in the shuttle eye as the quill is falling.

In our present invention we change the direction of fall of the expelled quill or bobbin so that in its fall the head 2 is momentarily retarded in its downward movement or in fact bounced upwardly to a slight degree, so that the shank l swings downwardly and falls foremost thus completely drawing the remnant thread 8 from out of the eye 4. To attain this end we secure a buifer member 9 in the downward path of travel of the head 2 and with which the head 2 comes into con tact. In the construction as illustrated in the drawings the buffer member 9 is a metal 'L shaped member suitably secured to the side plate 10 of the chute 6. The head 2 of the exhausted quill or bobbin as illustrated in Fig. 2 by the upper arrow falls foremost due to its weight and also due to the impact of the head of the replacement quill, until it comes into contact with the buffer 9 which momentarily retards the head 2 in its downward movement thus permitting the shank 1 to swing downwardly into a foremost position as illustrated by the lower arrow in Fig. 2. The downward swing of the shank 1 prevents the remnant thread 8 from unwinding thereoif and draws such remnant thread from out of the eye 4: of the shuttle. The quill or bobbin then continues its fall downwardly into the receiving receptacle underneath.

In the carrying out of our invention in the provision of our butler 9 we found that the resilient quality and position of such buffer were very important features. WVe found that'if a substantially solid buffer were used and positioned approximately as shown in our drawings that the head of the bobbin upon striking the buii'er would occasionally bounce upwardly back into contact with the shuttle and j amb the mechanism, and that if the buffer were placed further down the chute 6 so that the rebound of the bobbin head did not effect the shuttle, that very frequently the bobbin head in its downwardly swinging and falling movement would fall clear of and not impact with the bufier. If in order to remedy this the buffer was extended out, however, into the path offall of the bobbin, the bobbin would very frequently strike the buffer too close to the centre of the bobbin shank and thus defeat the object of the invention in having the shank fall foremost.

It was therefore found that the practical solution to the various problems presented was to have the buffer positioned adjacent to the shuttle substantially as illustrated in the drawings and to design the buffer of resilient or snubbing form, wherein, it had a resilient movement "downwardly when struck by the bobbin head so that any impact bounce of the bobbin head was eliminated or very materially reduced or snubbed.

We have placed our device upon a number of looms which are in continuous use and have found that without exception the provision thereof entirely prevents the residue thread from remaining in the shuttle when the quills or bobbins are being replaced, and although we have described and illustrated a particular embodiment of our invention it is to be understood that we may make such changes and alterations as we may from time to time deem necessary without departing from the spirit of our invention as set forth in the appended claims.

What we claim as our invention is:

1. In a loom, the combination with the shuttle and the expellable weft bobbin carri'ed in the shuttle, of a substantially horizontal. member projecting .into the path of fall of the expelled bobbin and with which the heavier endof the bobbin makes momentary contact.

2. In a loom, the combination with the shuttle and the expellable weft bobbin carried in the shuttle, of a resilient member projecting into the path of fall of the expelled bobbin and with which the heavier end of the bobbin makes momentary contact.

3. In a loom comprising a shuttle, an expellable bobbin carried in the shuttle, and a downwardly extending chute through which the expelled bobbin falls, of means positioned in the chute adjacent to the shuttle from which the bobbin is expelled and upon which the heavier end of the expelled bobbin momentarily rests.

4:. In a loom, the combination with the shuttle and an expellable weft bobbin carried in the shuttle, of a buifer member projecting into the path of fall of the expelled bobbin and upon which the heavier end of the bobbin momentarily rests.

5. In a loom comprising a shuttle, an expellable bobbin carried in the shuttle, of a buffer member positioned in the path of the expelled bobbin adjacent to the shuttle from which the bobbin is expelled and upon which the heavier end of the expelled bobbin momentarily rests.

' PIERCE REPMAN WATSON.

ANNIE GWENDOLYN PHILIPSON. 

